MIAMISBURG, Ohio (WKEF/WRGT) - An emotional collapse was caught on camera in a court room as former Miamisburg middle school teacher Jessica Langford was found guilty on all counts of having sex with an eighth grader.

Now, FOX 45 is investigating the warning signs that Miamisburg City Schools had more than a year before the encounter that lead to Langford's arrest.

The Montgomery County Prosecutor's Office said the sex acts happened at Miamisburg Middle School in May 2017.

When the verdict was read in court Friday, Langford fell to her chair and began visibly sobbing.

She was found guilty on all counts: six of unlawful sexual conduct with a minor and sexual battery as a teacher.

Langford was caught on school surveillance with the teen victim who gave graphic testimony Thursday.

"We were having sex for 20 to 30 minutes then time was running out," the teen testified.

The defense did not comment about the verdict, but the prosecution spoke following the decision.

"She did violate the trust of the community, of the school, of society generally speaking by taking advantage of a young student," said prosecutor Michele Henne.

FOX 45 has learned Miamisburg City Schools had a list of nine concerns about Langford's inappropriate behaviors dating back more than a year before her arrest.

In a previously missing part of her personnel file, the document states the principal and other administrators reprimanded Langford for the concerns, including two male students having daily closed door lunches in Langford's classroom, alleged "flirting" with male students and sitting on one male student's lap in class.

The school district did not return FOX 45's phone calls about the document but did confirm it.

FOX 45 reached out to Langford at her home in Centerville, but got no answer.

She remains out on bond until her sentencing May 14. Prosecutors say they're asking for the max prison time, which is five years for each of the six counts.

"For future cases it sends a signal to the community that any teacher needs to respect the appropriate boundaries with their students," Henne said.